In a move that many could see coming well before Lincoln found Sara's head in a box, FOX has announced that Prison Break is officially ending its four-season run.

Entertainment Weekly got the exclusive scoop from executive producer Matt Olmstead, who cited plummeting viewership as the reason for the cancellation.

Olmstead also explained to EW that there was, "nowhere to go beyond this season,'' adding that he ''didn't want the show to become a parody of itself.''

Prison Break returns April 17 to air its remaining six episodes. Michael and Lincoln (Wentworth Miller and Dominic Purcell) will finally catch a break -- at a huge cost -- in May's finale. Says Olmstead, ''There will be deaths.''